Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must carry the burden. It mentions a cost and a 'verdict' but lacks details on data sources, freshness, rate limits, or whether it is read-only. Behavior is minimally disclosed.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is very concise, packing cost, comparison scope, and output components into one sentence. However, it front-loads cost over functionality, which could be reordered for clarity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema and a complex comparison tool, the description should explain return values (yields, T-bill rate, spread, verdict). It does not, leaving agents guessing about the output structure.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 50% (min_tvl described, x_payment not). The description adds no additional meaning to either parameter, leaving x_payment unexplained with only its name visible.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it compares 'top stablecoin DeFi yields vs official US T-bill rate' and provides 'spreads + verdict', distinguishing it from sibling tools like defi_yields or us_treasury_rates which focus on one side.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for cross-comparison with 'TradFi x DeFi in one call' and mentions cost, but does not explicitly state when to use versus sibling tools or when not to use it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.